I did the same thing last winter. I had full t2 and was working on my t3. Then they released the patch that changed the way honor worked. I played for 2 weeks after that and realized I wasn't having fun (and hadn't been for months). Sad thing is, I had had the game for a little more than a year (13 mo) and had logged 114 days played. So I logged off, and canceled my account and never logged in again after that even though I had 5 months of credit left on my account.
It's not all bad, I had a lot of good memories from pvping with friends. Me (a hunter), 2 ex high warlords from when it was actually hard to get (shammy with hand o rag and warrior) and my roommate (priest) would just roam around silithus and BRM killing everything and everyone for hours. I have a video of me and the shammy killing 5 people, but taking so long to do it (FUCK pallys) that the first dead started to rez when the last was killed. So we ended up killing all 5 of them twice and we managed to get out of there alive before they came back a third time. Puts a smile on my face to watch the clip. Great times, but in the end it was a complete waste of a year of my life.
Good for you on dropping the game.